Fainting after running should be highly attention, common in syncope, acute cerebrovascular disease, as follows: 1, syncope: mainly due to overexertion or malignant cardiac arrhythmia, mainly manifested as a sudden loss of consciousness, fall to the ground, call out, some patients have limb convulsions, urinary and fecal incontinence, etc., the duration of the symptoms can be long or short, the symptoms recovered after the inability to recall all that happened at that time, it is recommended to go to the hospital Neurology or cardiology consultation, to exclude the cause of fainting; 2, acute cerebrovascular disease: the most common in cerebral hemorrhage, in addition to feeling dizzy, can be accompanied by limb weakness, sensory impairment, choking on drinking water, dysphagia, hoarseness, etc., and some patients may have blurred consciousness, incontinence, should go to the hospital in a timely manner to the hospital, if necessary, the CT examination of the cranium, for the cerebrovascular disease of the patient has been clearly should be Hospitalization.